www bzfxw com Magnetic materials — Part 8 6 Specifications for individual materials — Soft magnetic metallic materials BS EN 60404 8 6 2009 raising standards worldwide™ NO COPYING WITHOUT BSI PERMISSI[.]
BS EN 60404-8-6:2009 BSI British Standards Magnetic materials — Part 8-6: Specifications for individual materials — Soft magnetic metallic materials NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW raising standards worldwide™ BRITISH STANDARD BS EN 60404-8-6:2009 National foreword This British Standard is the UK implementation of EN 60404-8-6:2008 It is identical to IEC 60404-8-6:1999 It supersedes BS 6404-8.6:1988 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/5, Magnetic alloys and steels A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © BSI 2009 ISBN 978 580 63311 ICS 29.030 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2009 Amendments issued since publication Amd No Date Text affected EUROPEAN STANDARD BS EN 60404-8-6:2009 EN 60404-8-6 NORME EUROPÉENNE EUROPÄISCHE NORM January 2009 ICS 29.030 English version Magnetic materials Part 8-6: Specifications for individual materials Soft magnetic metallic materials (IEC 60404-8-6:1999 + A1:2007) Matériaux magnétiques Partie 8-6: Spécifications pour matériaux particuliers Matériaux métalliques magnétiquement doux (CEI 60404-8-6:1999 + A1:2007) Magnetische Werkstoffe Teil 8-6: Anforderungen an einzelne Werkstoffe Weichmagnetische metallische Werkstoffe (IEC 60404-8-6:1999 + A1:2007) This European Standard was approved by CENELEC on 2008-12-01 CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels © 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60404-8-6:2009 E BS EN 60404-8-6:2009 EN 60404-8-6:2009 –2– Foreword The text of the International Standard IEC 60404-8-6:1999 + A1:2007, prepared by IEC TC 68, Magnetic alloys and steels, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 60404-8-6 on 2008-12-01 without any modification The following dates were fixed: – – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the EN have to be withdrawn (dop) 2009-12-01 (dow) 2011-12-01 Annex ZA has been added by CENELEC Endorsement notice The text of the International Standard IEC 60404-8-6:1999 + A1:2007 was approved by CENELEC as a European Standard without any modification In the official version, for Bibliography, the following note has to be added for the standard indicated: ISO 286-1 NOTE Harmonized as EN 20286-1:1993 (not modified) BS EN 60404-8-6:2009 –3– EN 60404-8-6:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Publication Year Title EN/HD Year IEC 60050-121 1978 International Electrotechnical Vocabulary (IEV) Chapter 121: Electromagnetism - - IEC 60050-131 1978 International Electrotechnical Vocabulary (IEV) Chapter 131: Electric and magnetic circuits - - IEC 60050-221 1990 International Electrotechnical Vocabulary (IEV) Chapter 221: Magnetic materials and components - - IEC 60404-1 1979 Magnetic materials Part 1: Classification - - IEC 60404-2 1996 Magnetic materials Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame EN 60404-2 1998 IEC 60404-4 1995 Magnetic materials Part 4: Methods of measurement of d.c magnetic properties of magnetically soft materials EN 60404-4 1997 IEC 60404-6 1) 1986 Magnetic materials Part 6: Methods of measurement of the magnetic properties of isotropic nickel-iron soft magnetic alloys, types E1, E3 and E4 - - IEC 60404-7 1982 Magnetic materials Part 7: Method of measurement of the coercivity of magnetic materials in an open magnetic circuit - - IEC 60404-8-2 1998 Magnetic materials Part 8-2: Specifications for individual materials - Cold-rolled electrical alloyed steel sheet and strip delivered in the semi-processed state - ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ ——————— 1) IEC 60404-6:1986 is superseded by IEC 60404-6:2003, which is harmonized as EN 60404-6:2003 BS EN 60404-8-6:2009 EN 60404-8-6:2009 –4– Publication Year Title EN/HD Year IEC 60404-8-4 1998 Magnetic materials Part 8-4: Specifications for individual materials - Cold-rolled non-oriented electrical steel sheet and strip delivered in the fully-processed state - - IEC 60404-8-7 1998 Magnetic materials Part 8-7: Specifications for individual materials - Cold-rolled grain-oriented electrical steel sheet and strip delivered in the fully-processed state - IEC 60404-8-8 1991 Magnetic materials Part 8: Specifications for individual materials Section 8: Specification for thin magnetic steel strip for use at medium frequencies - IEC 60404-8-10 1994 Magnetic materials Part 8: Specifications for individual materials Section 10: Specification for magnetic materials (iron and steel) for use in relays - IEC 60404-9 1987 Magnetic materials Part 9: Methods of determination of the geometrical characteristics of magnetic steel sheet and strip - IEC 60635 1978 Toroidal strip-wound cores made of magnetically soft material - - ISO 404 1992 Steel and steel products - General technical delivery requirements - - ISO 10474 1991 Steel and steel products - Inspection documents - - ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ BS EN 60404-8-6:2009 –2– 60404-8-6 © IEC:1999+A1:2007 CONTENTS Scope .4 Normative references Definitions Classification 4.1 Alloy class A (pure iron) 4.2 Alloy class C (silicon-iron) 4.3 Alloy class E (nickel-iron) .7 4.4 Alloy class F (cobalt-iron) Designation General requirements .8 6.1 Chemical composition and production process 6.2 Delivery condition Technical requirements 8 7.1 Magnetic properties 7.2 Geometric characteristics and tolerances Inspection and testing .9 8.1 General 8.2 Selection of samples 10 8.3 Magnetic properties 10 8.4 Geometric characteristics and tolerances 11 8.5 Retests 11 Complaints 11 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 10 Ordering information 12 11 Certification 12 Bibliography 18 Table – Chemical composition of the alloy classes in accordance with IEC 60404-1 12 Table – Minimum permeability requirements .13 Table 2a – Minimum amplitude permeability requirements for sheet and strip – AC measurement (50 Hz or 60 Hz), sine flux conditions, thickness 0,05 mm to 0,38 mm 13 Table 2b – Minimum serial inductance permeability requirements for sheet and strip – AC measurement (0,3 kHz, kHz, kHz, 10 kHz and 30 kHz), thickness 0,025 mm to 0,35 mm 14 Table – DC magnetic property requirements for bar, billet, rod, sheet, strip and wire, a thickness or diameter greater than 0,05 mm – S.R., L.R or E.S specimen 15 Table – Maximum permeability rise factor for sheet and strip – L.R test specimen, a.c measurement (50 Hz or 60 Hz) .16 Table – Dimensional requirements for toroidal strip-wound cores 16 Table – Tolerances on thickness of cold-rolled sheet and strip 16 Table – Tolerances on width of sheet and strip 17 Table – Tolerances on dimensions of cold-worked bar, rod and wire 17 BS EN 60404-8-6:2009 –4– 60404-8-6 © IEC:1999+A1:2007 MAGNETIC MATERIALS – Part 8-6: Specifications for individual materials – Soft magnetic metallic materials Scope This part of IEC 60404 specifies the general requirements, magnetic properties, geometric characteristics and tolerances as well as inspection procedures for pure iron, silicon-iron, nickel-iron and cobalt-iron The materials are in the form of bar, billet, sheet, strip or wire The alloys covered correspond to those defined by classes A, C1, C2, E1 to E4 and F1 to F3 in IEC 60404-1 Magnetic materials used primarily for relays, pure iron and steel products, classified only by coercivity, are covered in IEC 60404-8-10 IEC 60404-8-10 is less restrictive in terms of magnetic properties than the pure iron material (class A) and the silicon-iron alloys (classes C21 and C22) specified in this standard, but it gives more comprehensive dimensional tolerances Non-oriented and oriented silicon steels (C21 and C22) for industrial power frequency applications, classified by specific total loss, are covered in IEC 60404-8-2, IEC 60404-8-4 and IEC 60404-8-7 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Non-oriented and oriented thin magnetic materials for use at medium frequencies, classified by specific total loss, are covered in IEC 60404-8-8 Normative references The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies IEC 60050(121):1978, International Electrotechnical Vocabulary (IEV) – Chapter 121: Electromagnetism IEC 60050(131):1978, International Electrotechnical Vocabulary (IEV) – Chapter 131: Electric and magnetic circuits IEC 60050(221):1990, International Electrotechnical Vocabulary (IEV) – Chapter 221: Magnetic materials and components IEC 60404-1:1979, Magnetic materials – Part 1: Classification IEC 60404-2:1996, Magnetic materials – Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame IEC 60404-4:1995, Magnetic materials – Part 4: Methods of measurement of d.c magnetic properties of iron and steel IEC 60404-6:1986, Magnetic materials – Part 6: Methods of measurement of the magnetic properties of isotropic nickel-iron soft magnetic alloys, types E1, E3 and E4 BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 –5– IEC 60404-7:1982, Magnetic materials – Part 7: Method of measurement of the coercivity of magnetic materials in an open magnetic circuit IEC 60404-8-2:1998, Magnetic materials – Part 8-2: Specifications for individual materials – Cold-rolled electrical alloyed steel sheet and strip delivered in the semi-processed state IEC 60404-8-4:1998, Magnetic materials – Part 8-4: Specifications for individual materials – Cold-rolled non-oriented electrical steel sheet and strip delivered in the fully-processed state IEC 60404-8-7:1998, Magnetic materials – Part 8-7: Specifications for individual materials – Cold-rolled grain-oriented electrical steel sheet and strip delivered in the fully-processed state IEC 60404-8-8:1991, Magnetic materials – Part 8: Specifications for individual materials – Section 8: Specification for thin magnetic steel strip for use at medium frequencies IEC 60404-8-10:1994, Magnetic materials – Part 8: Specifications for individual materials – Section 10: Specification for magnetic materials (iron and steel) for use in relays IEC 60404-9:1987, Magnetic materials – Part 9: Methods of determination of the geometrical characteristics of magnetic steel sheet and strip IEC 60635:1978, Toroidal strip-wound cores made of magnetically soft material ISO 404:1992, Steel and steel products – General technical delivery requirements ISO 10474:1991, Steel and steel products – Inspection documents Definitions ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ For the purpose of this part of IEC 60404, the definitions of the principal terms relative to magnetic properties and to electric and magnetic circuits given in IEC 60050(121), IEC 60050(131) and IEC 60050(221) apply, as well as the following definitions 3.1 ageing change of coercivity, expressed as a percentage, resulting from heat treatment 3.2 bar solid product of uniform cross-section supplied in straight lengths The cross-section may be round, square, rectangular or regular polygonal flat: A bar of rectangular cross-section, rolled on the four faces, whose thickness is generally mm or greater and whose width is not greater than 150 mm round: A bar of circular cross-section whose diameter is generally mm or greater 3.3 billet solid product of uniform cross-section, which may be square, round or rectangular, with a width less than twice the thickness 3.4 edge camber the edge camber is characterized by the greatest distance between an edge of the sheet and the line joining the two extremities of the measured length of this edge (see IEC 60404-9) BS EN 60404-8-6:2009 –6– 60404-8-6 © IEC:1999+A1:2007 3.5 flatness (wave factor) the flatness of a sheet is characterized by the wave factor, which is the relation of the height of the wave to its length (see IEC 60404-9) 3.6 heat product of a furnace melt or of a number of melts that are mixed prior to casting 3.7 lot material from the same heat, of the same form, produced at the same time and, if annealed, heat-treated together or sequentially in a continuous furnace 3.8 rod cold-drawn product of uniform rectangular or round cross-section, supplied in straight lengths 3.9 sheet and plate flat-rolled product of uniform cross-section, supplied in coils or cut lengths The width is over 600 mm; sheets have a thickness under mm and plates have a thickness over mm 3.10 straightness of long products straightness is characterized by the greatest distance between the bar and the line joining the two ends of the bar ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 3.11 strip flat-rolled product of uniform cross-section, supplied in coils or cut lengths The width is under 600 mm and the thickness under mm 3.12 wire rolled or drawn product of uniform round or rectangular cross-section, supplied in coils 3.13 Abbreviations for test specimens Type E.S.: Elongated specimen for test samples, of circular, rectangular or polygonal crosssection, with a length to diameter ratio of at least 5/1, according to IEC 60404-7 Type L.R.: Laminated cores of stamped or etched rings (for magnetic head ring, a core with 10 mm outside diameter and mm inside diameter can be used) Type S.R.: Solid rings or square frames, formed or machined from solid material The outside diameter of the ring shall be between 30 mm and 50 mm, with an outside/inside diameter ratio from 1,2 to 1,4 NOTE Types L.R and S.R are only applicable to essentially isotropic materials Type S.W.: Strip-wound cores as defined by IEC 60635 For dimensional restrictions, see table The outside diameters of test cores are between 30 mm and 80 mm BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 –7– Classification The materials covered by this standard are classified according to the main alloying element and the content of this element The subclassification takes into account the different uses of the alloys 4.1 Alloy class A (pure iron) This material is classified according to the maximum value of coercivity 4.2 Alloy class C (silicon-iron) Alloy C1, with % to % weight of silicon, is classified according to the maximum value of coercivity Alloys C2, with 0,4 % to % weight of silicon, are classified according to the shape of the hysteresis loop and the minimum permeability in an a.c measurement with a L.R specimen made of material with a thickness of 0,35 mm; the measuring point is H$ = 1,6 A/m 4.3 Alloy class E (nickel-iron) These alloys are classified according to the shape of the hysteresis loop and the minimum amplitude permeability in an a.c measurement (50 Hz or 60 Hz), under sine flux conditions, with a S.W specimen made of material with a thickness of 0,10 mm 4.4 Alloy class F (cobalt-iron) ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ These alloys are classified according to the shape of the hysteresis loop and to the maximum value of coercivity Designation The conventional designation of the materials comprises the following in the order given: a) the letter for the alloy class: A, C, E or F (see table 1); b) the number according to the content of the main alloying element (see table 1); c) for alloy classes C, E and F, the number or according to the shape of the hysteresis loop: = round (non-oriented) = rectangular (oriented by texture or by thermomagnetic treatment); d) a dash; e) depending on the alloy class, either the maximum value for the coercivity in amperes per metre or the peak value of the minimum permeability divided by 000 for a given magnetic field strength ( H$ = 0,4 A/m or 1,6 A/m) and a given thickness measured with a certain test specimen (see above under classification) Example: E31-10: nickel-iron with 45 % to 50 % weight of nickel, a round hysteresis loop, and a minimum permeability of 10 000 for a strip-wound core made of a sheet with a thickness of 0,10 mm BS EN 60404-8-6:2009 –8– 60404-8-6 © IEC:1999+A1:2007 General requirements 6.1 Chemical composition and production process The typical composition of each of the material classes covered by this standard is given in table The actual composition and production process are left to the discretion of the manufacturer, unless otherwise agreed between the manufacturer and purchaser, and specified in the order 6.2 Delivery condition The materials covered by this standard may be delivered in the hot-finished, cold-worked or annealed condition The condition required shall be specified in the order 6.2.1 Form of supply Coils shall be of constant width and wound in such a manner that the edges are superimposed in a regular manner and the side faces of the coil are substantially flat Coils shall be sufficiently tightly wound that they not collapse under their own weight Coils can occasionally present welds or interleaves resulting from the removal of defective zones, subject to prior agreement between the parties The value of the additional thickness due to the weld is subject to special agreement If necessary, the marking of welds or interleaves may form the subject of a special agreement For coils containing repair welds or interleaves, each part of the strip shall be of the same quality material ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The edges of parts welded together shall not be so much out of alignment as to affect the further processing of the material The mass of coils shall be agreed upon at the time of ordering 6.2.2 Surface condition The surface condition of sheets or strips shall be uniform, clean, and free from grease and rust Isolated imperfections such as scratches, blisters, etc may be tolerated if the thickness remains within the tolerance limits and the manufacture or performance of the final product is not affected The nature of the surface condition will depend on the final treatment For material in the hotrolled condition, the material exhibits a hot mill scale 7.1 Technical requirements Magnetic properties Unless otherwise required by the order, the magnetic properties shall be determined for each lot of material on a representative sample taken from the lot and heat-treated in accordance with the recommendations of the manufacturer or as specified by the purchaser Acceptance testing of sheets and strips shall be carried out by a.c testing of laminated rings (type L.R.) or strip-wound cores (type S.W.), or by d.c testing of either solid rings (type S.R.), laminated rings (type L.R.) or elongated specimens (type E.S.) BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 –9– The properties shall meet the magnetic requirements specified in Tables to for the alloy, the magnetic grade and the thickness specified in the order For intermediate thicknesses not given in the table, the values for the next thicker group shall apply When a.c magnetic testing is used to demonstrate conformance of the alloy to this standard, either amplitude permeability measurements (Table 2a) or serial inductance permeability measurements (Table 2b) can be used It is not a requirement of this standard that both methods must be used The method used shall be subject to agreement between the manufacturer and the purchaser 7.2 Geometric characteristics and tolerances 7.2.1 Flat products: sheet, plate and strip 7.2.1.1 Thickness The thickness of sheet and strip shall not vary by more than the tolerances indicated in table 7.2.1.2 Width The width of strip shall not vary by more than the tolerances indicated in table 7.2.1.3 Flatness The wave factor, expressed as a percentage, shall not exceed % and flatness shall be as agreed between manufacturer and purchaser 7.2.1.4 Edge camber ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The edge camber shall be as agreed between the manufacturer and the purchaser 7.2.2 Cold-drawn bar, rod and wire The diameter, width and thickness tolerances shall be as specified in table 7.2.3 Hot-finished bar Tolerances shall be as agreed between the manufacturer and the purchaser 8.1 Inspection and testing General The materials defined by this standard are generally ordered with inspection in accordance with ISO 404 The purchaser shall specify, when ordering, the properties for which the verification shall be made, the type of inspection and the related document (see ISO 10474) In the case of an order without inspection, as a dispensation from ISO 404, the manufacturer and the purchaser shall agree which property shall be certified, for example the maximum coercivity of the delivered material BS EN 60404-8-6:2009 – 10 – 60404-8-6 © IEC:1999+A1:2007 Each acceptance unit shall comprise not more than 23 t of the same grade and the same nominal dimensions Different acceptance units can be adopted by special agreement For products supplied in coil form, each coil shall constitute an acceptance unit When the products are delivered in the form of slit coils, the test results applying to the parent unit of acceptance shall apply Except by special agreement, the same rules apply to the characteristics which are specifically specified 8.2 Selection of samples As far as possible only one sample for acceptance inspection shall be taken from each acceptance unit The same sample shall serve to check the various properties by choosing a suitable order for the execution of the tests 8.2.1 Flat products In the case of coils, the first internal turn and the last external turn shall be regarded as wrapping and not as representative of the quality of the rest of the coil The selection shall be made from the first internal or external turns, excluding the wrapping turn The selection shall be made away from weld zones or interleaves In the case of sheets or plates, the sample shall be taken from the upper part of the bundle 8.2.2 Long products The sample shall be taken from the bundle 8.2.3 Wire ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The sampling shall be carried out at the end of the coil 8.3 8.3.1 Magnetic properties Magnetic testing, d.c methods Measurement of d.c flux density, permeability and coercivity shall be in accordance with IEC 60404-4 and IEC 60404-6 8.3.2 Magnetic testing, a.c methods Measurement of a.c flux density and permeability shall be in accordance with IEC 60404-2 and IEC 60404-6 Unless otherwise specified, a test frequency of 50 Hz or 60 Hz shall be used When amplitude permeability measurements are made, the test conditions shall conform to sine flux (sine B) When inductance permeability measurements are made, the serial inductance permeability shall be measured 8.3.3 Test specimens The type of test specimens to be used for testing is indicated in tables to by the abbreviations for test specimens given in 3.13 BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 8.4 – 11 – Geometric characteristics and tolerances 8.4.1 Thickness of flat products The measurement of thickness shall be made at any point 10 mm or more from the edges, except for widths less than 25 mm, which shall be measured at any point The measurement shall be made using a micrometer accurate to 1/100 mm 8.4.2 Width of flat products The width shall be measured perpendicularly to the longitudinal axis of the strip 8.4.3 Flatness The flatness (wave factor) of flat products shall be measured in accordance with IEC 60404-9 8.4.4 Edge camber The edge camber shall be determined in accordance with IEC 60404-9 8.4.5 Dimensions of long products The dimensions of long products shall be determined as the mean of readings taken at any two points, with an accuracy of 0,1 mm 8.4.6 Straightness of long products ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ The straightness shall be measured with an accuracy of 0,1 mm 8.5 Retests If a test specimen fails to meet the specified requirements, two further test specimens from the same lot shall be selected for testing If both of the additional samples pass, the lot is regarded as complying with the requirements of this standard If either of the further test specimens fails, the lot shall be rejected The producer has the right, after retreatment, to present again for test acceptance those units which had been found not to comply with the order Complaints Internal or external defects shall justify a complaint only if they are clearly prejudicial to the method of working or the judicious use of the material The user shall give the supplier the opportunity of convincing himself of the fairness of the claim by presenting the material in dispute and evidence for the complaint In all cases, the terms and conditions of complaint shall be in accordance with ISO 404 BS EN 60404-8-6:2009 – 12 – 60404-8-6 © IEC:1999+A1:2007 10 Ordering information For material to comply adequately with the requirements of this standard, the purchaser shall include the following information in his enquiry or order: a) nature of the product and the designation of the material in accordance with clause 5; b) quantity required, including any limitations on the mass of coils (see 6.2.1); c) inspection procedure required, including the nature of the related documents (see 8.1 and clause 11); d) type of tolerances when necessary (see 7.2); e) the following additional requirements, which shall be specified by the purchaser at the time of order; in the case where nothing is specified, the producer shall consider that there are no particular requirements on this point: – presence of welds or interleaves, and their possible marking (see 6.2), – delivery of materials in the fully processed condition (see 6.3), – magnetic characteristics in the aged condition (see 7.1) 11 Certification When required by the purchaser and stated in the order (see clause 10), the manufacturer shall certify that the material has been manufactured and tested in accordance with the requirements of this standard The certificate shall detail the results of all tests required by the order ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Table – Chemical composition of the alloy classes in accordance with IEC 60404-1 Alloy class Constituents in accordance with IEC 60404-1 A Typical compositions a Mass fraction in % Co Cr Cu Mo Ni Si V 100 Fe – – – – – – – C1 – Si – – – – – – 4,5 – C21 0,4 – Si – – – – – – 4,5 – C22 Si – – – – – 2,5 – 3,5 – – 2–3 1–6 – 75 – 80 – – – – 1–6 3–5 75 – 80 – – – – – 3,5 – 79 – 82 – – E1 70 – 85 Ni E2 54 – 68 Ni – – – – 53 – 65 – – E3 41 – 51 Ni – – – – 42 – 49 – – E4 35 – 40 Ni – – – – 36 – 40 – – F1 47 – 50 Co 47,5 – 50 – – – – – 1,7 – 2,5 F2 35 Co 34,5 – 36 – – – – – – F3 23 –27 Co 23 – 28 – – – – – – Typical compositions of each alloy class are shown as the examples and other compositions are acceptable if the magnetic property requirements in this standard are satisfied a Remainder: iron BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 – 13 – Table – Minimum permeability requirements Table 2a – Minimum amplitude permeability requirements for sheet and strip – AC measurement (50 Hz or 60 Hz), sine flux conditions, thickness 0,05 mm to 0,38 mm Alloy class a Magnetic grade Measuring point Minimum amplitude permeability for a thickness, in millimetres, of Specimen Hˆ ( A / m) 0,35 0,20 A As agreed between manufacturer and purchaser C1 As agreed between manufacturer and purchaser C21 –9 C22 –13 Alloy class a Magnetic grade 1,6 L.R Measuring point Specimen Hˆ ( A / m) –60 –100 E31 –6 0,10 0,05 20 000 20 000 18 000 16 000 40 000 40 000 35 000 30 000 50 000 60 000 60 000 50 000 100 000 120 000 120 000 100 000 000 000 000 000 000 000 000 000 10 000 10 000 000 000 200 200 200 200 900 900 900 500 b 30 000 30 000 30 000 b 60 000 60 000 60 000 b 80 000 100 000 100 000 b 160 000 200 000 200 000 b 000 000 000 b 000 000 000 b 10 000 10 000 10 000 b 200 200 200 b 900 900 500 0,4 –10 E41 –2 –3 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 0,8 –30 E11 –60 –100 0,4 –200 S.W –4 E31 –6 0,4 –10 E41 –2 –3 E21 E32 -– 0,15 – 0,20 L.R –4 300 0,30 – 0,38 0,4 –200 750 Minimum amplitude permeability for a thickness, in millimetres, of –30 E11 900 0,8 As agreed between the manufacturer and the purchaser F1 F2 As agreed between the manufacturer and the purchaser F3 a The second digit of the alloy class stands for the shape of the hysteresis loop: = round (non-oriented); = rectangular (oriented) b Type S.W should not be used in this thickness range BS EN 60404-8-6:2009 – 14 – 60404-8-6 © IEC:1999+A1:2007 Table 2b – Minimum serial inductance permeability requirements for sheet and strip – AC measurement (0,3 kHz, kHz, kHz, 10 kHz and 30 kHz), thickness 0,025 mm to 0,35 mm Alloy a class Magnetic grade Measuring point Hˆ ( A/m) –100 0,4 0,35 0,20 0,15 0,10 0,05 0,025 0,3 12 000 24 000 27 000 30 000 – – L.R 800 10 000 12 000 20 000 25 000 30 000 or – – – 000 – – S.W 10 – – – – 000 18 000 Specimen E11 E31 0,4 30 – – – – – 000 0,3 – – – 40 000 – – 40 000 40 000 – – – 25 000 or – – – 10 000 – – S.W 10 – – – – 000 20 000 30 – – – – – 12 000 L.R 0,3 000 600 – – – – 200 400 – 000 – – L.R –200 Minimum a.c inductance permeability for a thickness, in millimetres, of Measuring frequency kHz –6 0,4 or S.W – – – 500 – – –10 0,4 L.R or S.W 0,3 600 000 – 000 – – L.R 0,3 900 000 – – – – –2 0,4 or 800 900 – 900 – – – – – 800 – – L.R 0,3 500 800 – – – – or 000 300 – 600 – – S.W – – – 000 – – E41 –3 0,4 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ S.W a The second digit of the alloy class stands for the shape of the hysteresis loop: = round (non-oriented); = rectangular (oriented) NOTE There is no corresponding measurement procedure in the IEC 60404-6 up to now However, 60404-6 is under revision, and will be amended correspondingly BS EN 60404-8-6:2009 60404-8-6 © IEC:1999+A1:2007 – 15 – Table – DC magnetic property requirements for bar, billet, rod, sheet, strip and wire, thickness or diameter greater than 0,05 mm a – S.R., L.R or E.S specimen Alloy b class A C1 Minimum magnetic polarization in teslas Magnetic grade 000 – 1,15 1,30 – 1,60 – – 1,15 1,30 1,45 1,60 –80 80 – 1,10 1,20 1,30 1,45 1,60 –60 60 – 1,15 1,25 1,35 1,45 1,60 –20 20 1,15 1,25 1,30 1,40 1,45 1,60 –12 12 1,15 1,25 1,30 1,40 1,45 1,60 –48 48 0,60 – 1,10 1,20 – 1,50 –24 24 1,20 – 1,30 1,35 – 1,50 –12 12 1,20 – 1,30 1,35 – 1,50 Magnetic grade point Hˆ –60 0,4 –6 0,4 –10 –3 0,8 Maximum coercivity in amperes per metre for a thickness, in millimetres, of Minimum permeability for a thickness, in millimetres, of 0,05-1,5 >1,5 0,05-1,5 >1,5 30 000 15 000 4 60 000 30 000 100 000 50 000 000 000 000 000 10 000 000 500 500 E21 Minimum magnetic polarization in teslas ˆ in amperes per metre for H 20 50 100 500 800 0,40 0,55 0,60 0,63 0,65 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 0,50 0,65 0,70 0,73 0,73 12 12 10 10 0,50 0,90 1,00 1,30 1,40 6 0,50 0,90 1,10 1,35 1,40 24 24 0,20 0,45 0,70 1,00 1,10 As agreed between the manufacturer and the purchaser E32 Magnetic grade –240 F11 000 – –4 Alloy b class 500 120 –100 E41 300 240 –30 E31 200 –120 A/m E11 100 –240 Measuring Alloy b class ˆ in amperes per metre for H Maximum coercivity A/m –120 Supplied form Bulk material, hot–rolled Dimensions mm Maximum coercivity A/m >6 Minimum magnetic polarization in teslas for Hˆ in amperes per metre 300 800 600 800 000 000 240 1,40 1,70 1,90 2,00 2,06 2,15 1,70 2,00 2,10 2,15 2,20 2,25 Rod, wire d≤6 120 Sheet, strip 0,05 ≤ t ≤2,0 120 – – – – – – –60 Sheet, strip 0,05 ≤ t ≤2,0 60 1,80 2,10 2,20 2,23 2,25 2,25 F12 –30 S.W 0,05 ≤ t ≤1,5 30 F21 –300 Bulk material >6 300 – 1,20 1,30 1,35 – – Sheet, strip F31 –300 As agreed between the manufacturer and the purchaser 0,05 ≤ t ≤2,0 300 – 1,50 1,60 1,80 2,00 2,20 Bulk material >6 300 – – – – 1,10 1,75 Sheet, strip 0,05 ≤ t ≤2,0 300 – – – – 1,85 2,00 a The properties for 0,05 mm to mm thicknesses refer to sheet and strip only For bar, billet, rod and wire with small cross-sections, magnetic polarization shall be determined on S.R specimens taken at an earlier stage of manufacture b The second digit of the alloy class stands for the shape of the hysteresis loop: = round (non-oriented); = rectangular (oriented by texture or thermomagnetic treatment) BS EN 60404-8-6:2009 – 16 – 60404-8-6 © IEC:1999+A1:2007 Table – Maximum permeability rise factor for sheet and strip – L.R test specimen, a.c measurement (50 Hz or 60 Hz) Alloy class Magnetic grade δ 0,4 a δ8b 10 –2 m/A 10 –2 m/A E41 –2 4,7 3,1 C21 –9 – 15,7 C22 –13 – 15,7 a δ 0,4 = (μ 1,6 − μ 0,4 ) /(μ 0,4 ⋅ ΔH ) = 0,833(μ 1,6 − μ 0,4 ) / μ 0,4 (m/A) b δ8 = (μ8 − μ1,6 ) /(μ1,6 ⋅ ΔH ) = 0,156(μ8 − μ1,6 ) / μ1,6 (m/A) The indices denote the field strength, in amperes per metre (A/m) Table – Dimensional requirements for toroidal strip-wound cores Alloy class Ratio of dimensions E11 – E41 E32 Outside/inside diameter ( d / d ) 1,2 – 1,6 1,2 – 1,6 Height/inside diameter ( h / d ) 0,2 – 1,1 0,2 – 1,1 Inside diameter/strip thickness ( d / t ) > 100 > 100 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ Table – Tolerances on thickness of cold-rolled sheet and strip Thickness (t) * Tolerance in millimetres* for nominal width w in millimetres mm 50 < w < 150 150 < w ≤ 300 300 < w ≤ 600 w > 600 0,05 ≤ t < 0,15 ±5 % ±5 % ± 7,5 % ± 10 % 0,15 ≤ t < 0,25 ± 0,020 ± 0,020 ± 0,025 ± 0,030 0,25 ≤ t < 0,50 ± 0,025 ± 0,030 ± 0,030 ± 0,040 0,50 ≤ t < 0,75 ± 0,030 ± 0,045 ± 0,045 ± 0,050 0,75 ≤ t < 1,00 ± 0,030 ± 0,045 ± 0,045 ± 0,065 1,00 ≤ t < 1,25 ± 0,040 ± 0,045 ± 0,045 ± 0,065 1,25 ≤ t < 1,50 ± 0,040 ± 0,045 ± 0,045 ± 0,075 1,50 ≤ t < 1,75 ± 0,040 ± 0,050 ± 0,065 ± 0,075 1,75 ≤ t < 2,00 ± 0,040 ± 0,050 ± 0,065 ± 0,090 2,00 ≤ t < 2,25 ± 0,050 ± 0,055 ± 0,065 ± 0,100 2,25 ≤ t < 2,50 ± 0,050 ± 0,055 ± 0,065 ± 0,120 For thicknesses equal to or greater than 0,05 mm and smaller than 0,15 mm the tolerance is given in percent